Hi, if this is a common question, please forgive me as a newbie of Elasticsearch.
If I have a ES cluster with 2 nodes and totally I have 10 indexes, each index with 4 shards.
How many MergeScheduler are there in clusers?
That's said a shard is actually a LuceneIndex, does it mean we have 40 MergeScheduler prepared when booting Elasticsearch server?
Or each node has only one MergeScheduler?